Sub-Band Duplex Resource Configuration for Interference-Aware TDD
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing sub-band full duplex (SBFD) resource configurations, particularly in managing uplink and downlink transmissions to optimize spectral efficiency and reduce interference.
Innovation Solution
Implementing a method for configuring wireless communication resources using a time division duplexing pattern and transitioning to a sub-band full duplex (SBFD) format based on specific conditions, allowing flexible resource allocation for improved communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If time division duplexing pattern is used for resource configuration, then uplink and downlink transmissions are managed with simple structure, but spectral efficiency is limited and interference cannot be reduced effectively
Solution Approach 1:
The frequency spectrum is segmented into multiple sub-bands, allowing independent configuration of each sub-band for uplink or downlink transmissions. This segmentation enables simultaneous bidirectional communications in different frequency portions without requiring complex full-duplex processing, thus improving spectral efficiency while maintaining manageable system complexity.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by allowing flexible sub-band configuration within time slots. Instead of traditional time-division only, the system can dynamically allocate specific sub-bands for uplink or downlink based on traffic conditions, adding frequency-dimension flexibility to time-division duplexing and improving overall spectral efficiency.
2Ease of operation
If static resource configuration is used, then system operation is simple and stable, but adaptability to changing communication conditions is insufficient
Solution Approach 1:
The resource configuration is made dynamic by allowing the network to reconfigure sub-band assignments based on real-time traffic conditions and channel state information. The system can switch between different sub-band configurations (uplink-heavy, downlink-heavy, or balanced) without requiring complete system reconfiguration, thus maintaining operational simplicity while significantly improving adaptability.
Solution Approach 2:
The patent changes key configuration parameters such as the set of active sub-bands, the directionality assignment of each sub-band, and the timing of uplink/downlink transmissions. By dynamically adjusting these parameters based on communication conditions, the system achieves flexible adaptation while maintaining a relatively simple operational framework through automated parameter optimization.
3Productivity
If full-band full duplex is implemented, then spectral efficiency is maximized, but interference between uplink and downlink transmissions becomes difficult to manage
Solution Approach 1:
By segmenting the total bandwidth into multiple sub-bands and assigning different sub-bands to different directions (uplink or downlink), the system achieves spatial separation of transmissions. This frequency-domain segmentation reduces mutual interference between uplink and downlink signals while maintaining high spectral efficiency through simultaneous bidirectional communications in different sub-bands.
Solution Approach 2:
Different sub-bands are assigned different transmission directions based on local traffic conditions and interference characteristics. The system can identify which sub-bands are less prone to interference and assign them to critical transmissions, creating local optimization of transmission quality. This allows the system to achieve high spectral efficiency in low-interference sub-bands while maintaining overall system performance.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may output a first configuration for a set of resources, the first configuration being associated with a time division duplexing pattern, and the first configuration configuring the set of resources to one of an uplink format, a downlink format, or a flexible format. The network node may output a second configuration configuring one or more resources, of the set of resources, to a sub-band full duplex (SBFD) format based at least in part on the one or more resources satisfying a condition. Numerous other aspects are described.